Elevator-door lock



Sept, '4, 1923. 1,466,900

R. J. HARPER, SR

ELEVATOR DOOR LOCK Filed Feb. 14 1922 2 sheets-shet 1 Sept. 4, 1923.

1,466,900 R. J HARPER, SR

ELEVATOR DOOR LOCK Filed Feb. 14, 1922 2 Sheets-Sheet 2 v 9 R; J Harper @r. s A/ 1 Patented Sept. 4, 1923.

ROBERT Hearse, SR, or cnroeeo, innrivors.

nnEvAron-noon LUCK.

Application filed February 1 1922. Serial No. 536,422.

To all whom it may concern:

Be it known that 1, ROBERT J. HAnrnR, Sn, a citizen of the-United States, residing at Chicago, in the county of Cook and State of Illinois, have invented. certain new and useful Improvements in Elevator-Door Locks; and I do hereby declare the-following to be a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and use the same.

The invention relates to elevators and more particularly to safety means whereby to secure the door at a landing and thereby prevent a casualty such as frequently occurs when doors at the various landings of an elevator shaft are not made secure.

The present invention relates to lock means for securing the door at each of the floors or landings of an elevator shaft and aims to provide a lock mechanism which may be easily and quickly applied and which is simple in construction, efficient and not liable to derangement and which, moreover, embodies afew number of parts.

Other objects and advantages will be ap parent and suggest themselves as the nature of the invention is understood.

While the drawings illustrate an embodiment of the invention it is to be understood that in adapting the same to meet different conditions and requirements, various changesin the form, proportion and minor details of construction may he resorted to without departing from the nature of the invention.

Referring to the accompanying drawings forming a part of the application,

Figure 1 is a fragmentary elevation of a freight elevator provided with lock means embodying the invention, 7

Figure 2 is an edge view of the parts illustrated in Figure 1, partly in section,

Figure 3 is a section on the line 33 of Figure 1, looking in the direction of the arrows and showing a key in position for opening the look from the floor side,

Figure 4 is a horizontal section on the line a-d of Figure 1,

Figure 5 is ahorizontal section on the line 55 of Figure 2,

Figure 6. is a horizontal sectionon the line 6-6 of Figure 2, and

Figure 7 is a detail perspective view of the lock frame which is attached'to the elevator door.

' Corresponding and like parts are referred to in the following description and desig nated in the several viewsof the drawings by like reference characters.

The numeral 1 designates a side wall of the structure enclosing theelevator shaft or well at a landing or floor. A door 2 is provided for closing the opening leading to the well or shaft and in the present instance said dooris mounted to slide vertically .although the direction of movement is immaterial with reference to the operation of the lock 1nechanism.. VA flange or like part projects inwardly from the side wall 1 bordering upon the door openingandcooperates with a companion flange 4: at. the adjacent edge of the door 2, the two flanges 3 and a abutting when the 7. door is closed. These parts'may be of any construction and arrangement, dependingupon the style and make of elevator; i w

The lock comprises a rectangular frame 5 which is bolted or otherwise secured to the inner side of the door 2 adjacent the edge provided with the flange 4:. In the present instance, the frame 5 is recessed to receive nuts 6 which are countersunk and cooperate with bolts 7, whereby the frame 5 is firmly attached to the door 2. A catch 8 is pivoted to the frame 5 and, as shown, consists of a plate having a flange 9 at one end and along opposite sides to embracev one end and opposite sides of the frame 5. The engag ing end of the plate is formed with a shoulder 10 which is adapted to engage under the flange 3 and secure the door 2. -The shouldered end 10 of the plate forming the catch 8 is extended and deflected laterally so a to ride upon the flange 3 as the door 2 closes. Lugs 11 project inwardly from the catch 8 and are apertured to receive a pintle 12 which passes through opposite members of theframe 5. The lugs 11 are disposed to engage the inner side of the mem-' bers of the frame 5 thereby preventing lateral displacement of the catch. Washers 13 are secured to opposite ends of the pintle 12 to prevent displacement thereof and yet catch in position to engage the flange 3, whereby to lock the door when-1n closed po-' sition. The springs Mare of expansible helical form and are retainedin'place by recesses formed in the frame 5 and tits, 16

provided on the catch 8 engaging opposite ends or the springs.

The invention is particularly adapted for from the floor side of a landing by means of a key 17 which is adapted to be thrust through an opening 18 formed in the frame and catch 8 in coincident position, said key embodyin. a turnbuckle 19 which,

' after clearing the inner side of the catch 8,

assumes a position crosswise of the opening 18, whereby pull upon the key 17 operates the catch 8 to effect release thereof from the flange 3 whereby the door 2 maybe opened.

Certain liability bureaus require the locks on all elevator doors to be blankbut one so that access to the car may be had at one landing only. To meet these conditions, it is proposed to have all the locks applied to the doors of an elevator shaftblank with the exception of one which will be construct ed so as to cooperate with a key as indicated most clearly in Figure 3 of the accompanying drawings. This result may be accomplished by not boring the elevator doors to which the locks are attached with the exception of the one designed to he opened by means of the key 17.

What is claimed is:

1. An elevator door lock comprising an open frame, a catch comprising a plate having an engaging shoulder at one end and provided at its opposite end and along its sides with. an off-standing flange, said flange to be disposed alongthe outer wall of said open frame, perforated lugs carried by said catch and extending into said open frame and engaging theinner side walls thereof, a

pintle passing through said frame and said perforated lugs to-pivot said catch to said frame, and spring means disposed between said frame and catch to normally hold said catch in fastening position.

2. A lock for an elevator door comprising a frame. a spring actuated catch pivoted to the frame, both the frame and catch having openings in coincident position, and a key for operating the catch and embodying a turnbuckle, said key being adapted to be re movably thrust through the openings of the frame and catch, the turnbuckle assuming a position crosswise of the openings after clearing the catch, said turnbuckle serving tov prevent withdrawal of the key from the 

